Irwin 1870987 Square Recess Double-Ended Impact Bit, #3SQ Tip

Irwin 1870987 Square Recess Double-Ended Impact Bit, #3SQ Tip

The Irwin 1870987 Square Recess Double-Ended Impact Bit puts two #3 square-recess driving tips on one cold-forged, high-grade steel shank, giving pros and DIYers a single bit that lasts twice as long between changes. Built with Irwin's DoubleLok Technology™, both ends of the bit lock securely into impact drivers and quick-change chucks, so the second #3SQ tip is always ready to go once the first wears down. Precision tip geometry improves fitment inside the fastener head, cutting down on stripping and cam-out during high-torque driving. The bit's Power Groove is also designed to work with the IRWIN® Impact Performance Series™ Magnetic Screw-Hold Attachment for one-handed fastener starts.

Key Features

• DoubleLok Technology™: Secures both ends of the bit inside impact drivers and quick-change chucks, allowing the user to flip the bit and access a fresh tip once the first end wears out.
• Dual #3SQ Tips: First Tip #3SQ and Second Tip #3SQ give two usable square-recess driving points from a single bit, adding convenience and extending overall bit life.
• Precision Tip Geometry: Engineered fitment reduces stripping and cam-out for cleaner engagement with square-recess fasteners under high-torque impact driving.
• Power Groove Design: Compatible with the IRWIN® Impact Performance Series™ Magnetic Screw-Hold Attachment, helping hold fasteners in place for one-handed starts.
• Heavy-Duty Steel Construction: Cold-forged, high-grade steel construction is built to withstand the high torque output of modern impact drivers.

Technical Specifications

• Item #: 1870987
• Bulk Item #: 1871065
• First Tip: #3SQ
• Second Tip: #3SQ

Typical Applications

• Impact Driver Fastening
• Square-Recess Screw Driving
• Cabinet, Deck, and Trim Installation
• Professional Trade and Jobsite Toolkits
• General Construction and DIY Repair Projects

Why Irwin?

Irwin builds this double-ended bit from cold-forged, high-grade steel and backs it with DoubleLok Technology™ so both ends stay locked in tight through demanding impact-driving work. Precision-ground #3SQ tips on each end reduce stripping and cam-out, while Power Groove compatibility with the IRWIN® Impact Performance Series™ Magnetic Screw-Hold Attachment adds jobsite versatility. The result is a durable, dual-tip bit engineered to cut down on bit changes and keep fastening work moving.